Diodes Incorporated AP2820HM-G1

Overview

AP2820HM-G1 from BCD Semiconductor Manufacturing Limited is a high-side power distribution switch with active-low enable and open-drain fault flag, designed for USB-compliant hot-plug power management. It integrates an N-channel MOSFET with 60 mΩ R_DS(ON), 2.5 A continuous load capability, under-voltage lockout (2.5 V threshold), and thermal shutdown at 150 °C - enabling robust protection in notebook motherboard and USB hub power rails.

For engineers reviewing the AP2820HM-G1 datasheet, AP2820HM-G1 pinout, AP2820HM-G1 application, or AP2820HM-G1 equivalent, this device supports precise current-limiting (3.4 A typ.), soft-start control (500 μs turn-on), deglitched FLAG response (10 ms fault delay), and reverse-current blocking - critical for USB bus self-powered hub design and battery-charger circuit safety validation.

Technical Context

The AP2820HM-G1 implements a charge-pump–driven high-side N-MOSFET architecture to maintain low on-resistance across 2.7–5.5 V input range while delivering 2.5 A continuous output. Its fold-back over-current protection reduces short-circuit current to 1.18 A, and integrated thermal shutdown triggers at 150 °C with 30 °C hysteresis to prevent latch-up during sustained overload.

It features dual-level enable logic (active-low for HM variant), UVLO with 2.5 V rising threshold and 0.2 V hysteresis, and a deglitched open-drain FLAG pin that sinks ≥5 mA at ≤70 mV - allowing direct interfacing with USB controller GPIOs without external level-shifting.

Key Specifications

Pinout & Package

AP2820HM-G1 is packaged in SOIC-8 (M package), with exposed pad not electrically connected. Pin functions are validated per Figure 2 of Rev 1.7 datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side power switch applications.

Compared with TPS2051BDR, AP2820HM-G1 delivers lower R_DS(ON) and integrated safety features; versus AP2820GM-G1, it omits auto-discharge but retains identical protection thresholds and FLAG behavior - offering design flexibility in discharge control strategy.

Availability

AP2820HM-G1 is available at Aetrix Electronics and suitable for USB power management, notebook motherboard power rails, and hot-plug power supply modules requiring stable component supply, RoHS-compliant green packaging, and long-term lifecycle support.

Supply support for AP2820HM-G1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

BCD Semiconductor Manufacturing Limited is a Shanghai-based analog IC designer and foundry partner specializing in power management, LED drivers, and USB-compliant interface solutions.

The AP2820 product line targets USB-compliant high-side power switching with integrated protection - optimized for notebook, docking station, and peripheral hub applications demanding low R_DS(ON), fast fault reporting, and safety certification.

FAQ

What is the maximum continuous output current rating for AP2820HM-G1?

The AP2820HM-G1 is rated for 2.5 A continuous output current, as confirmed by the "Condition H" designation in the ordering information table (Section 4). This rating applies across the full operating ambient temperature range of –40 °C to +85 °C and is supported by thermal shutdown at 150 °C junction temperature with 30 °C hysteresis.

Does AP2820HM-G1 include an internal discharge path for VOUT after shutdown?

No - AP2820HM-G1 does not include the auto-discharge function. Per the ordering table, "H" denotes active-low enable without auto-discharge. Unlike AP2820GM-G1 (which includes a 100–200 Ω internal pull-down), HM-G1 requires external circuitry if rapid VOUT decay is needed after disable.

How does the FLAG pin behave during over-current events?

The FLAG pin is an open-drain output that pulls low (≤70 mV at 5 mA sink) within 10 ms (typical) of over-current detection. It remains asserted until the fault condition clears and the device recovers - with deglitching to reject transient spikes. A pull-up resistor is mandatory in application per datasheet Figure 28.

Is AP2820HM-G1 compatible with both 3.3 V and 5 V logic systems?

Yes - the EN pin accepts logic-high up to 5.5 V and defines active-low threshold as ≤1.0 V, making it compatible with both 3.3 V and 5 V microcontrollers. The FLAG pin's open-drain structure allows flexible pull-up to either rail, supporting mixed-voltage system interfacing without level shifters.